This is another of the Star Trek red alert circuit that you can find on this site. We took this version from an English publication from the 80s.
Found in an Australian documentation from 1991, this circuit was sold in a kit at the time. It is a...
Found in a RCA manual from the 1960s, this circuit uses components from that time. It can generate...
This circuit makes it possible to recover programs recorded on cassette tape as was common in MSX...